Two-Dimensional Description of Potential Perturbations to the Ozone Layer Due to NOx and H2O Aircraft Emissions,

Abstract : This report is divided into two parts. Part I is an interim report, which describes the basic two-dimensional photochemical model of the atmosphere developed to model the distribution of trace species in the natural atmosphere, as well as potential perturbations arising from NOx and H2O emissions from a fleet of supersonic and subsonic aircraft projected to be operational in the 1990-2000 year timeframe. A listing of the model transport parameters is included. Part II includes an update for the natural and perturbed atmosphere using rates recommended by the panel in 1982. Distributions of trace species calculated for a natural atmosphere are in relatively good agreement with observations. The potential effect of NO emissions from the fleet of subsonic and supersonic aircraft examined in this study is to slightly increase the ozone column.